Pattern mechanism for looms



Dec. 13, 1949 o. MOBERG PATTERN MECHANISM FOR LOOMS e Shets-Sheet 1Filed March 5, 1948 Dec. 13, 1949 l. o. MOBERG PATTERN MECHANISM FOR L QOMS 6 Sheets-Sheet 2 Filed March 5, 1948 Dec. 13, 1949 1. o; MOBERGPATTERN MECHANISM FOR LOOMS e Sheets-Sheet s Filed March 5, 1948 Dec.13, 1949 L o. MOBERG PATTERN MECHANISM FOR LOOMS 6- Sheets-Sheet 4 FiledMarch 5, 1948 Dec. 13, 1949 1.0. MOBERG 2,491,388

PATTERN MECHANISM FOR LOOMS Filed March 5, 1948 6 Sheets-Sheet 5 o I i lr a E Z a to Dec. 13, 1949 I I 1, MQBERG 2,491,388

PATTERN MECHANISM FOR LOOMS FiledMarch 5, 1948 I 6 Sheets-Sheet s lFig.6.

Patented Dec. 13, 1949 UNITED STATES PATENT OFFICE 2,491,388.- PATTERNMECHANISM FOR LooMs Ivar 0. Mohcrg, Lowell; Mass. Application March 5,1948, Serial No. 13,306;

15,Claims.'

This invention relates to looms and more espe daily to dobbies, headmotions, and similar mechanisms used in looms to produce special weaveswhich cannot be made automatically in plain looms. For convenience thesemechanisms will be referred to as dobbies or dobby motions.

When it is desired to weave "a pattern which requires more changes inweave than can be produced in a plain loom, the natural expedient is" touse a dobby motion. Also, if the pattern to be woven is such that itcannot be produced practically with a dobby, then it becomes necessaryto use a Jacquard loom. However, the practical disadvantages of theselatter looms are such that they are employed only with considerablereluctance.

The present invention aims to devise a mechanism of the dobby type whichcan be used to produce a variety of weaves far beyond the range of thepresent dobbies and which, in addition, will afiord a high rate ofproduction and will be thoroughly reliable in operation. In other words,the invention has for its chief object to devise a mechanism which cando everything that the present conventional dobbies can do and much thatthey are unable to do.

An important use for such mechanism occurs, for example, in themanufacture of electrically heated blankets, such as those disclosed inmy Patents Nos. 2,203,918 and 2,432,785. Each of these blanketscomprises at least four and, more commonly, five or six different weavesthroughout its entire length. Consequently, the total number of picks orfilling threads in one of these blankets is at least 3,000 whichrequires pattern chains of an impractical length. Thus, for a singleindex dobby 'a chain of 3,000 bars would be required, while a doubleindex dobby'wouldreduce this number to 1500 bars, and a double cylinderdobby would require a chain of over 700 bars. In practice a chaincontaining more than 400 bars is generally considered to be impractical;Of course a Jacquard loom also would require a chain of 3,000 cards toproduce one of these blank ts, but because, in this case, the weavewould be controlled by cards instead of bars, as in the dobby, longchains such as those just described are not considered to beimpractical. However, the Jacquard loom when employed to manufacture oneof these electric blankets has several serious disadvantages, such as 1.It is costly to run and maintain;

'2. It is expensive in changing over'flQmf-one.

fabric construction to another;

The t of cards and lacing is vat hi'ghi 4-. The frequence of drostitches results in producing a high percentage of blankets which areuseless-for electric wiring because the channels through which the wiresare threaded are blocked; and

5. There are relatively few Jacquard looms existence.

The present invention provides a mechanism of the dobby type with theaid of which these blanket fabrics can be manufactured at a substantialsaving in expense as compared to their production in Jacquard looms.

The nature of the invention will be readily un} derstood from thefollowing description when read in connection with the accompanyingdrawings, and the novel features will be particularly pointed out intheappended claims.

In the drawings,

Fig. 1 is a front elevation of a loom equipped with a mechanismembodying the present inv ntion;

Fig. 2 is an elevation of the right-hand side of the construction shownin Fig. 1;

Fig. 3 is an elevation of some of the parts of the mechanism shown inFig. 1 as viewed from the left-hand side of'the machine;

Fig. 4 is a vertical, longitudinal, sectional view through parts of; themechanism illustrated in Fig. 1;

Fig. 5 is a transverse, vertical, sectional View taken substantiallythrough the shaft of the cylinder mechanism;

Fig; 6 is a front elevation of parts for driving the main shaft of thelatter mechanism;

Fig. '7 is a plan view of the lever mechanism at the top of Fig. 1';

Fig; 8 is a side View showing some dobby finger mechanism; r

Fig. 9 is a vertical, sectional view showing twg arrangements foroperating the dobby fingers Fig. 10 is a side elevation, partly insection, showing the relation between the pawl and its ratchet wheel;and

Fig. 11 shows a modified form of pin cylinder.

The invention is here disclosed as embodied in a dobby of a commoncommercial form applied to a high-speed Crom-pton and Knowles Model N0.C4 loom. The dobby chain has been elimi nated, but all of the othercommon dobby parts, have been retained. 1

Referring to Fig. 2 it will be observed that the mechan sm themllustrated includes the usual dobby jacks '2, supp ted in n orthod x d bframe 8 nnected with a set of harnessed. one or which is shown at 4.Also, as illustrated details ofthe in Fig. 4, the dobby jacks areconnected to the jack backs 5 mounted in the frame in the usual manner,the mechanism including upper and lower sets of dobby hooks 6 and 7associated with a set of dobby fingers 8, dobb needles l0, and upper andlower dobby knives H and [2, respecrtively. The knives are operated byrocker arms 13-43 mounted on a shaft M. Fig. 1 shows the drive rod l5connecting one of the rocker arms with the dobby crank 16 fast on thebottom shaft or cam shaft H of the 100m which rotates once for each twopicks of the loom. All of the mechanism above described is constructed,arranged, and operates in the well known manner.

The dobby cylinder which, in the customary construction carries thedobby chain, is shown at [8, Fig. 1, and it may be left in place. It ismounted on the shaft 20 which is here utilized in a novel manner.

According to the present invention the cus tomary pattern chain isreplaced by a series of cylinders each carrying several rows of pins,all of these cylinders being mounted on a rotatable carrier and spacedapart equally around the axis of the carrier. Mechanism is providedwhereby the cylinders can be revolved around their own axes, and theentire carrier, with the cylinders, can be rotated around the axis ofthe carrier so as to bring any desired cylinder into operating position.The machine also includes a set of special dobby fingers arranged tooperate the regular fingers. The uppermost pin cylinder at any instantis in position to operate these special fingers selectively, and. thecylinders themselves may be revolved by a sun gear driven from theregular dobby cylinder shaft 2e.

Referring to Figs. 4 and 5, the pin cylinders just described are thereshown at 2!, six of these cylinders being mounted for rotation aroundtheir individual axes in a carrier comprising heads 22 and 23 mounted torotate around the shaft 24 which is supported for rotation on an arm 25and a bracket 26, both secured rigidly to the dobby frame. At theleft-hand end, Fig. 5, a sun gear 21, secured on the shaft 24, mesheswith planetary gears 28 fast on the ends of the respective pin cylinders25. Each cylinder carries several rows of pins, in this particularconstruction eight such rows bein provided, and the up permost row ofpins in the cylinder which is on top at any instant is arranged tooperate the special or supplemental dobby fingers at, as will be evidentfrom an inspection of Fig. 4, in the same manner that the pins on thebars of the orthodox dobby chain operate the dobby fingers. Preferablyeach finger is counterweighted, as indicated at W, and is provided atits lower side with a groove or run for the pins cooperating with it,just as are the regular dobby fingers. These special fingers aresupported in parallel. side by side relationship, but are held apart byfront and rear spacers or combs S and S, and

they are all fulcrumed on the stationary shaft 29. Also, each specialfinger 3G is connected by a link 3| with one or more regular dobbyfingers 8, as will be understood from an inspection of Figs. 8 and 9. Inthe arrangement here used each link 31 carries a cross pin 32, Fig. 9,at its lower end so that it operates two dobby fingers 8. This istypical of the single index type of dobby. In the double index dobby thelink is made as shown at 3| at the right of Fig. 9,

where it operates a single clobby finger 8.

Thus each row of pins on the uppermost cyl- 'inder 2| in the carrier22-23 operates through the special fingers 30 and their connections withthe regular dobby fingers to produce the same changes in weaving thatcould be produced in the orthodox dobby motions.

That is, the lifting of any dobby finger 8 results in lowering theright-hand ends of the two regular dobby fingers 8 controlled by it, andthis: motion lowers the dobby hooks 6 and 1, controlled by thoseparticular fingers, into position for actuation by the dobby knives uponthe next oscillating movement of the rocker arms. The jacks connectedwith these particular dooby hooks consequently are operated to raisetheir respec tive harnesses.

By revolving the topmost cylinder 21 a pattern, predetermined by thepositions of the pins in the. different rows, can be produced andrepeated or changed, as desired. It may here be pointed out that thepins used in the cylinders 2! preferably are like those used in theregular pin bars of. the common forms of dobby chains.

Rotation of the cylinders 2i for the purpose: just described is producedby revolving the sun. gear 21 around its own axis while the carrierremains stationary. For this purpose the shaft as is equipped at itsright-hand end, Fig. 5, with a sprocket wheel 33, Figs. 2 and 5, andthis Wheel. is driven by a chain 34 operated by another sprocket wheelfast on the regular dobby cylinder shaft 20. An idler 35 is adjustableto keep the. desired tension on this chain. The shaft 29 is: driventhrough a clutch 36, Figs. 1 and 6, arranged to slip under an overload,a positive clutch and an intermittent double worm gear mechanism 31driven by the shaft 38 which, in turn, is driven through connectionswith the crank: shaft of the loom in the usual way. This shaft 38 alsodrives the box chain 43 at the head of. the frame. It makes onerevolution for each two picks of the loom. The loom partly shown in thedrawings, however, is assumed to have four boxes at one end and one boxat the other, so that changes of boxes can be made only on alternatepicks when the shuttle is at the four box end.

In this machine the intermittent double worm drive 31 is designed toproduce one-sixth of a rotation of the shaft Zi for every pick of theloom, and this movement is transmitted through the connections abovedescribed to the pin cylinder 2! in operative position to give itoneeighth of a rotation around its own there .being eight rows of pinsin each cylinder. This brings another row of pins into operativeposition at every pick. Thus each row of pins determines the arrangementof warps that will be produced for the next succeeding pick, and thatarrangement can be predetermined by the positions of the pins in thecylinder.

As will be obvious to those skilled in this art, the number of pincylinders 2i used in the carrier 22-23 can be made greater or less thanthe number shown, and also that the number of rows of pins in eachcylinder can be varied, changes in the timing of the movements of thecarrier and the cylinders being produced to make them operate as abovedescribed. For example, if each cylinder carries eight rows of pins,then the rotative movement imparted to the carrier through the shaft 20and chain 34 will be one-eighth of a revolution of the cylinder 2! inoperative position, although all the other cylinders will be rotatedsimultaneously and to the same extent.

When it becomes desirable to rotate the carrier 2223 to move onecylinder 2| out of top central or operative position and to bringanmenses exzs hqz qe al anthemsc ai fifl-j i rmally v ,1s%l ts e iusts nsitiqn-w an 9 M9114 h F e. 3, with isarran edte st naq a a p zi grde rssi e sq r ket-see: o med-mim sar i h izfi etw en iacemen ah ar-y ears 8,r k ei un d on; .e an piiaisest n t va zarm nifzot'ed'. at. 4.4;, thecti n; szybein on i ue a lyz adi t b ezbmhe s ew and s ot rconnec i tonfil'zi, As uri Millfll heyanm -iemi s x imposition;totnraintain t 'he-IQ11:1 4= s eated inz any so ket? aw ich may be: brou t? into coope vrelationshipto it. It should be; observed; 110W!- ever, that thecarrier-includes,a;centra1'sleeve 2 .1 Ei faufihto which; the; heads]!and- 23; are rigidlitjsecured; thiesleeve being mounted-to re"- volve;around the; shaft zt and extending; at. the right beyond. the; carrier?and having a: ratchet wheelxfik-keyed or pinned: to said extension: Theratchet wheel lias a number of lpinateethzequalzto the number ofcylinders inathe. carrier and; spaced apart; bythe same: angulardistance that the cylinders. are spaced. around-i the s'haft: 2'4;

For the purpose of rotating this carrier: from one positioni'tosanother," a reversible;- pawl and ratchet mechanisnn'is provided"comprising? a pawl 4 1 best shown..in:.Ei"gsiT2E and i 10, having: anapproximately: elliptical. head. section land an elongated r tail piece;41' consistingiof .ai bar, in. tegral with: the pawlz 45!; pivoted: tothe": racker arm l3 at 48 and slidable through a: normallystationaryguide; 5m Thus the I pawl; is: reciprocatedby; the: rocked:arm; ance ineach; revolution of the cam shaft 11,; which" shaft also:makes-I'one revolution for each two picks oft the :I'oomi 'I he'pawlcarriesf anluppen dog- 51? andla: lower dog-.52; bth= adjiistablymounted: on the elliptical section of then-pawl 413s'Thesedogsiaretarrange'd to engage any; one-of, the series of six'pin'sf 53i Fig; in: said ratchet;- Wheel; 5413 Consequently; if: thepawl. 41 isaa'llowedfto dropzfar: enough to enable thedog: 51 toengageone of. the pins- 53 it will operate upon the? next rlght handl'stroke; Fighz; of. the;- pawl.- to. rot'atethecylinder carrier 2=2..;-Z&clockwiseaonessixth .oi. a: revolution," thus bringing; asdifierentcylinder: into "position to operate onzthe special doliby-finger's:30;." on the otherjhandi.if the' pawle41 is lifted far enough toQnabIeithe: dog: 52; to: engage said"pins 53,x"then uponuthe.nextright-hand: stroke of the paw'l it will swing' the carri'eif 22= 23 inal counten-clockwise direction; Fig: '2; oneisixthi of" a revolution;thusabr inging a. difl'ere'nt" cylinder. into" operafive-position;Normally" the" pawl 41- is'.h'e'l'd 'by-= itsifsupnorting mechanism inan-intermediate position where: it can; not: move the: carririneither-Ldinection,. although it. ispconstantly ramp: rocated timedrelation togthe: operationfoi: the" loom by its connection with: the rocker: arm:I31 I As above: indicated, this operating 'mechanish'r for; the. carrienis Aunderf the control. of. the. box hain: 4.0.; and such control: isafi'orded by -sue-'- pending t e guider 5ur fromv onearrm of: 'the'lver55- a-t.- the= ,hea,'d of the; frame-by means of; a; link? 5B Eielandizaand anniversai joint? 6 This l'even is fulcrumedonsaij floating.level." 51;; Fig; 1, which, in turn, is pivotedatja' a stationary? bae58, Fig.7. supporte horizontally; onframe p rts a -t head: o h machine;andfa spring; 601 1,? 1 actspmthe lever 51 to; pulli it. dowm yi l iney- .T Adiustah ya connected with ,m Ei- -D' muted; T shaphdi IGYBIZ. 6%?

iatnock h fulcrumed at 63 onitheiban 51.. Tworlinksfils 8 n v il gnnevtonnqsit en s- -s h ssn stekoflt i le A l-w t t maraIIQIsam p x ma ehotispn ai bars-. 6h ndifih z u1= m d o t sh ft 5 n o sawin -hall runs b.b,- Figs 2 3;,and flajw'hlqh are positioned directlygovertheunarginsgofthechain All, Y which controls theqcycle of; operatipnsofi the 1 loom-1 1' As above stated! this the box chain of. themachine.- It. is driven from i the shaft? 38, Fig: 1; through the:bevel; gear: connection 68-, shaft. '10-, and gear connections at, theright-of. the: frame withzasliait lal'iiFigsi. -1 .:and;4',;0na which a:Geneva driven-11:2; isseouredz: This"mem'ber drives: the Geneva: wheel?"13% 1005611011. thefsh-aft 'lt but'attacheditoithefsprockettwheelshwhich drive the boxxchain: loathe-arrangement being such. thatthis? chaimis: driver's one: 'bar'foi" each two picks ofitheploomt Theextent: to: which: the levers: 6B and? 51- can drop? is; limited: by twostops; that for. the. "lever 66: being? in; Fig.1 2and *comprisingfarre; versely (iiJtVlifStDfl ancfiguide' I15 having a slot; 'therei'ni'through? which? the "lever passes freely andiwith-its-ripper end; bentovers the bar 58': stop: screw 16 is threaded-"through this "Pb tion:ofthe ban is. where: it will. engage:theetdp ofithe?stationary-bar 58 andlimit."- therdownward movement: of. the lever 66; A similar; arrangementisi provided to cooperate with the lever 61 and the correspondihg partsare indicated by the-"same but- "primed; numerals, These stops are' used"to adiustand -to: equalize the: normal 'po'siti'ons of tha two levers66 and 61,

This chain mechanism a'nd the partsfor ariv ing it are standardequipment" on the particular machine "sh'dtvir; the: chain; carrying'rolls or balls for operating- "the box motion. According to thepresentinventioni'thepawl Al is brought into: operation to feed the pincylinder-carrier 22- -23 intone rectiensor'the other'by'means ofhalfroll's;"suoh as those shown at 80'; which are mounted on: thebpphsitemargins of the chain where they-cannot interfere with'themechanism for controlling the" se ect onof the shuttles; but" the'y'arein pos'itibn'to raise one'or' the other of the. levers. 6 G as U: w-hnthey are broughtunder the ball'aruns: carried b'y said? levers; 5

As will be seen froni a'n inspectionof Figs' I and" 2, one of these half'rolls or balls raises the" lever 'fii fiit wifl ti'p the rocking; lever62'- in a counter dlooltwlse" iiirectibn, lifting the center pivot 63 ofsaid 'lever againstthe tension of'the spring. 60', thus: operating throuh. the link 6 1;. bell crank lever 55 and rod 56 to raisethe pawl 41s.,"Thiswilllresultfiin producing" a counterclockwise rotation; of the pincylindercarrier; on the; otheizhan'd; if onekofi the half balls raises;the" lever '61; motioi't -fiimm it will be transmitted" through thecomections "just describedito lower: the pawl: 41" and firms "to create,an instantlater, a clockwise rotationziof: said: carrier-.

It:. may 'liere' 'he pointed out thatthe cylinders 24" have beenx shownequipped with eight rowsof pins? on pegs,=l-'which is: at typicalarrangement for 65 singlexindexingaOccasionally-the holes providedrequired? in these'fholesi ewe ope'z at 'theaddi tional dobby fingers.That is, there will be twice as many dobby fingers for double indexingas for single indexing. One set of fingers will be operated by the pinsP and the other set by the pins P.

The number of holes in a'horizontal row will correspond to the maximumnumber of harnesses to be operated by the dobby, and that number may begreater or less, as required forindividual situations. A typical numberof holes in each horizontal row is sixteen, but the number of pegs or'pins used may be much less. These holes are, of course, spacedlengthwise of the cylinders by a distance equal to the gauge of thedobby. 'The double intermittent worm drive shown in Fig. ii will turnthe standard dobby chain cylinder 60 for each revolution of the loomcrank shaft, but in the present mechanism this motion is transmittedthrough the sprocket and chain drive 3334 and the planetary gearing upto the pin cylinders so that each cylinder makes one complete revolutionfor eight picks in a filling repeat. To change this set-up for a doubleindication, a single intermittent worm will be substituted for thedoubleintermittent worm shown in Fig. 6, as is usual in driving theprior art dobby chains. If the set-up shown were arranged for a doubleindex indication, all sixteen rows of holes would be utilized and eachpin cylinder would make a complete revolution in sixteen picks in afillingrepeat. From the foregoing it will now be understood that theinvention provides a novel form of dobby motion in which the dobby chainand the objectionable features attending the use or" that chain areeliminated. In its place a multicylinder pattern mechanism is providedWhich is exceedingly reliable, can readily be modified to accommodatethe requirements of different weaves or fabric pattern effects, and withwhich a much wider range of woven patterns can be produced than would bepractical with a, conventional dobby mechanism. For example, while themechanism has been invented and developed primarily to meet therequirements of the manufacture of electric blankets, it is equallyuseful in the production of bed spreads, table cloths, curtains, towels,and any woven textile product in which two or more basic weaves occur.at long intervals. 1

Also, the changing or" the pins in the pin cyiinders 2! in order toshift from one pattern to an-' other is simplified as compared to thecorresponding operations in the orthodox dobby mechanism, particularlyif the new pattern to be produced is complicated.

Another unique and valuable feature of this mechanism is the fact thatthe pin cylinder 'carrier can be rotated either backward or'forward.This feature reduces the number of pattern-controlling elements requiredin making complicated weaves. As above stated, this mechanism will doeverything that the prior art dobbies will do and much that they cannotdo. For example, the electric blankets disclosed in my earlier patentsabove referred to can be manufactured in a standard loom equipped withthis mechanism whereas, as above stated, it has been found necessaryheretofore to manufacture such blankets in Jacquard looms.

The operation of the machine has been disclosed so fully in connectionwith the foregoing description of structure that any further statementasto operations is believed to be unneces sary.

The machine shown has been illustrated in con: nection with the standardmakeof loom most commonly used in the manufacture of blankets. But itwill be obvious to anyone skilled in this art that the invention isequally applicable to other standard looms and can likewise beincorporated in those special mechanisms for handling warps, such astwo-cylinder dobbies, head motions, and any of the commercial mechanismsof the dobby type. The adaptation of this invention to suchother loomsand dobby mechanisms will be obvious to any mechanic skilled in theirconstruction and use. For example, in applying this mechanism to somelooms, it will be found more convenient to use the double acting pawl4'! in a vertical position and to drive it from a cam located on theloom cam shaft.

Also, while the machine as above described and as illustrated with eightrows of holes in each cylinder makes it possible to produce any weavewith two, four or eight picks in a fillingrepeat with a single index,and any weave with two, four, eight or sixteen picks in a filling repeatwith a double index, it should be understood that the cylinders may alsobe made with siX or twelve rows of holes for weave repeats on three, sixor twelve picks.

Consequently, while I have herein shown and described a typicalembodiment of my invention, it will be evident that the invention may beembodied in numerous other forms without departing from the spirit orscope thereof.

Having thus described my invention, what I desire to claim as new is:

1. 'A dobby mechanism comprising a set of dobby fingers, dobby jacksconstructed to be connected with the harnesses of a loom, mechanismarranged to be brought into action by said fingers to operate said jacksselectively, and pattern mechanism for operating said fingers; saidpattern mechanism comprising a series of cylinders, a series of rows ofpins mounted on each cylinder, means supporting said cylinders formovement into and out of operative relation to said fingers to cause therows of pins on any cylinder in said operative relation to actuate saidfingers selectively, and mechanism for revolving an cylinder inoperative position to bring another row of pins into operativerelationship to said fingers.

- 2. A dobby mechanism comprising a set of dobby fingers, dobby jacksconstructed to be connected with the harnesses of a loom, mechanismarranged to be brought into action by said fingers to operate said jacksselectively, and pattern mechanism for operating said fingers; saidpattern mechanism comprising a series of cylinders, a series of rows ofpins mounted on each cylinder, a carrier on which said cylinders aremounted for rotation around their respective axes, and mechanism forrevolving any cylinder positioned in cooperative relationship to saidfingers to present the respective rows of pins one at a time to saidfingers in operative relationship thereto.

'3. A dobby mechanism according to preceding claim 2, in which saidcylinders are supported on said carrier in a circular series arrangedaround a common axis, in combination with mechanism for rotating saidcarrier around said axis to bring said cylinders one at a time intooperative relationship to said fingers.

4. A dobby mechanism according to preceding claim 2, in whichsaidcylinders are supported'on said carrier in a circular series arran edaround a common axis, in combination with mechanism for rotating saidcarrier backward and forward, as may be desired, to bring said cylindersone at a time into operative relationship to said fingers,

andvmechan-ism for revolving anyi cylinder positionedrincooperativerelationship-[to said fingers to prevent the-respectiverows'o-f pins one at a sun gear and secured, respectivelyfto saidcylirl ders.

6. A dobby mechanism according to preceding claim 2, in which saidcylinders' are supported'oii said carrier in a circular seriesarra'ngedaround a common axis, in combinationwith'mechanism for rotating saidcarrier around said axis to bring actuate1 said=fingers-'= selectivelyiand "mechanism-" for revolving'any' cylinder positioned in operativerelationship to .said fingers to bring any'desired row -'of pinsintoEcoopeiative relationship to said fingers, the last named mechanismbeing driven in timed relationsh-ipto the operation of said-main patternmechanisms i 1 Y 10. In a loom equipped with a main'p'atterrf' mechanismcontrolling'i-ts cyc'le'o'f operations, a

dobbymechanismcomprising-a' set of d'obby fingers dobby jacksconstructed to be connected with" the harnesses-of a=loomgmechanisniarranged to be broughtintoaction-by saidfingers'to'operate said -j acksselectively,-pattern-- mechanism for op-- crating said fingers; said -pattern-mechanism comprising a series of cylinders, a series of rows ofpins mounted on each cylinder, a carrier on which said cylinders aremounted in a circularsaid cylinders ina predetermined'order into op;erative relationship to said fingersy "s'aid me'cha' nism for rotatingsaid cylinders comprising a planetary gearing including a sun gearmounted to revolve around said axis and planetary gears meshing withsaid sun gear and secured, respectively, to said cylinders, said meansfor revolving the carrier comprising a tubular shaft rigid with saidcarrier and encircling the driving shaft of said sun gear.

7. A dobby mechanism according to preceding claim 2, in which saidcylinders are supported on said carrier in a circular series arrangedaround a common axis, in combination with mechanism for rotating saidcarrier around said axis to bring said cylinders one at a time intooperative relationship to said fingers, said mechanism for rotatin'gsaid cylinders comprising a planetary gearing including a sun gearmounted to revolve around said axis and planetary gears meshing withsaid sun gear and secured, respectively, to said cylinders, andmechanism for holding said carrier stationary in any position ofadjustment while said sun gear is being revolved.

8. A dobby mechanism according to preceding claim 2, in which saidcylinders are supported on said carrier in a circular series arrangedaround a common axis, in combination with mechanism for rotating saidcarrier around said axis to bring said cylinders one at a time intooperative relationship to said fingers, said mechanism for rotating saidcylinders comprising a planetary gearing including a sun gear mounted torevolve around said axis and planetary gears meshing with said sun gearand secured, respectively, to said cylinders, a drive shaft for said sungear positioned coaxially within said carrier, a tubular shaft rigidwith said carrier and encircling said drive shaft, and driving elementsfor said respective shafts secured to them.

In a loom equipped with a main pattern mechanism controlling its cycleof operations, a set of dobby fingers, dobby jacks connected with theharnesses of the loom to operate them, mechanism arranged to be broughtinto action by said fingers to operate said jacks selectively,additional pattern mechanism for operating said fingers; the latterpattern mechanism comprising a series of cylinders, a series of rows ofpins mounted on each cylinder, means supporting said cylinders formovement into and out of operative relation to said fingers to cause therows of pins on any cylinder positioned in said operative relation toseries arounda common axis, mechanism con-- trolled by said main patternmechanism of the loomiof'rot'ating said carrier to bring said cylinderscheat a time into cooperative relationship" to said fingers, andmechanism for revolving any" cylind'eif' positioned incooperative:relationship to said 'flhge'i'Std presnt'the'respective rowsof pins one at a time to the fingers in operative relationship thereto.

ll. In a loom equipped with a main pattern mechanism controlling itscycle of operations, a dobby mechanism comprising a set of dobbyfingers, dobby jacks constructed to be connected with the harnesses of am, mechanism arranged to be brought into action by said fingers tooperate said jacks selectively, pattern mechanism for operating saidfingers; said pattern mechanism comprising a series of cylinders, aseries of rows of pins mounted on each cylinder, a carrier on which saidcylinders are mounted in a circular series around a common axis, saiddobby mechanism including a rocker arm for driving one or more of thedobby knives, a pawl and ratchet mechanism connected with said rockerarm and driven thereby for rotating said carrier to bring said cylindersin a predetermined order into cooperative relationship to said fingers,connections between said pawl and ratchet mechanism and said mainpattern mechanism whereby the latter controls the operation of saidcarrier by said pawl and ratchet mechanism, and means for revolving anycylinder positioned in cooperative relationship to said fingers topresent the respective rows of pins one at a time to the fingers inoperative relationship thereto.

12. In a loom according to preceding claim 10, a construction in whichsaid main pattern mechanism comprises a pattern chain and said carrierrevolving mechanism includes a pawl, together with means for constantlyreciprocating it, a ratchet wheel arranged to be operated by said pawland connected with said carrier to impart rotative movements to it, andconnections between said pawl and said pattern chain whereby the lattercontrols the operation of said pawl on said ratchet wheel.

13. In a loom according to preceding claim 10, a construction in whichsaid main pattern mechanism comprises a pattern chain and said carrierrevolving mechanism includes a double acting pawl, together with meansfor constantly reciprocating it, a ratchet wheel arranged to be operatedin both forward and backward directions by said pawl, and mechanism forshifting the pawl from a position in which it feeds the ratchet wheel inone direction to another position for feeding said wheel in an oppositedirection; the latter mechanism comprisinga lever mounted to rockbetween -.two positions, means operated by pattern elements carried bysaid chain for tipping said lever from either of said positions to theother, and connections for transmitting motion from said lever to saidpawl to shift the pawl from one of its operative positions to the other.7

14. A dobby mechanism according to preceding claim 2, in which saidcylinders are supported on said carrier in a circular series arrangedaround a common axis, in combination with mechanism for rotating saidcarrier backward and forward, as may be desired, to bring said cylindersone at a time into operative relationship to said fingers, and mechanismfor revolving any cylinder positioned in cooperative relationship tosaid fingers to present the respective rows of pins one at a time tosaid fingers in operative relationship thereto, said mechanism forrotating said carrier comprising a reversible pawl and ratchetmechanism.

15. A dobby mechanism according to preceding claim 2, in which saidcylinders are supported on said carrier in a circular series arrangedaround a common axis, in combination with mechanism for rotating saidcarrier around said axis to bring said cylinders one at a time intooperative relationship to said fingers, said dobby mechanism including arocker arm for driving one at least of the dobby knives, and saidmechanism for rotating the carrier comprising a pawl and ratchetmechanism connected with and driven by said rocker arm.

IVAR O. MOBERG.

REFERENCES CITED Theffollowing references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,867,644 Ames July 19, 1932FOREIGN PATENTS Number Country Date 260,549 Italy Sept. 28, 1928

